They don't? Your files are local, the software's local.

I'm sure people who need this app would find it easier to switch to linux if that app becomes available on linux.

More options means better ease of switching.

Isn't it an opt-in by default program that pays artists commission fees for using their art? Or am I thinking of a different company.

Whichever one I'm thinking of, the Gen AI was for website templates, and that's about all I can remember other than reading about it and thinking "this is how it should be - gen AI to spit out hundreds of templates for buttons on websites that nobody wants to make."